Water-cooled lamp



F. A. ANDERSON.

WATER COOLED LAMP.

APPLICATION .FILED MAY 26. 192|.

1,435,193. PatentedN0v.14,1922

2 SHEETS-SHEET l.

F. A. ANDERSON.

WATER COOLED LAMP.

APPLICATION FILED MAY26,1921.

Patented Nov. 14, 1922.

UNITED STATES PATENT OFFICE.

FRITZ A. ANDERSON, OF MILTON, WISCONSIN, ASSIGNOR T0 BURDICK CABINET COMPANY, A CORPORATION OF WISCONSIN.

WATER-COOLED LAMP.

Application led May 26,

To all whom @'15 may concern.'

Be it known that I, FRITZ A. ANDERSON, a citizen of the United States, residing at Milton, in the county of Rock and State of Visconsin, have invented certain new and useful Improvements in W'atenCooled Lamps, of which the following is a specifica* tion.

The invention relates to improvements in water cooled lamps, and more particularly to lamps that are used for therapeutic pur poses.

Une of the objects of the invention is to improve the construction of such lamps by providing a variable heat conducting mef dium between the lamp body and the cooled casing of the structure, whereby, with a given cooling means, the extent to which the lamp, per se, may be cooled is regulable.

Another' object is to provide in the structure a. lamp-containing casing within an outer casing, and between which water is made to circulate.

Another object is to provide an elastic means for holding the lamp in the casing, so as to absorb any shocks or vibrations without imparting injury to the lamp.

Another object is to provide improved means for connecting the lamp in circuit.

Another object is to decrease the cost of such structures and to render them more convenient for manipulation and repairs.

Fig. 1 is a vertical section taken substantially on line 1-1 of Fig. 5.

Fig. 2 is a section taken substantially at right angles of Fig. 1.

Fig. 3 is a section taken substantially on line 33 of Fig. 2. Fig. 4 is a section taken substantially on line L1-4 of Fig. 2.

Fig. 5 is a section taken substantially 'on line 5-5 of Fig. 1.

Fig. 6 is a section taken substantially on line 6-6 of Fig.' 2.

'7 is a ferrule having a variable number of lingers for conducting heat from the lamp to the casing. y

In all the views the same reference characters are employed to indicate similar parts.v

The outer casing 10 encloses an inner cas- 1921. Serial No. 472,933.

ing 11 and in the space between the casings water is caused to circulate.

In the outer casing there is a wall 12 which extends transverselyacross the outer casing, and is provided with a perforation for insertion of the contracted end 11 of the casing 11, as clearly shown in Fig. 1. Below the partition wall 12, and in the outer' casing, is another water distributing wall 14, having holes 15 near the front part of the casing, and immediately above the space 16 between the lenses 17 and 18.

Another transverse wall 19 extends across the inside of the outer casing, as shown in Fig. 1 and Fig. 5, and is provided with a larger opening, or hole, for an enlarged part 11a of the inner casing. A ferrule 20 is insertable in the larger part 11a of the inner casing and the ring portion 21, of the ferrule, is Vcontained in the contracted part of the opening 11, as at 22, the fingers 23 extending downwardly for contact with the surface 24 of the lamp 25. The ferrule 20 may have a greater or less number of fingers 23 for the purpose of carrying away the heat from the surface of the lamp which they contact. By breaking oil' one or more fin gers 23, the heat carrying capacity 0f the device 2O may be reduced. It is well that the lamp 25 should retain a certain portion of heat in order that it may be efficient and in a lamp of this character it is verydesirable that a certain portion of the heat should be carried away by the water circulating between the two casings, so that the light projected from the lamp thru the lenses 17 and 18 may be relatively cool and that the surface of the casing structure may not be maintained at too high a temperature for convenience of handling; therefore the number of fingers 23 that are attached to the ring portion 21 determines the amount of heat that the lower end of the lamp will part with thru the instrumentality of the heat l conducting ferrule 20, by the surface of the fingers left depending from the ring por tion y21. The fingers 23 also serve as yielding means to prevent any'violent lateral vibration that may be imparted to the casing from reaching the lower end of the lamp.

`Extending from the -partition 12 to the partition 19, thru the water space, is a tube 26 thru which an electric conducting rod 27 passes to reach the terminal 28 of the lamp structure, where the conductor 27 is connected to a service wire 29 that comes from a suitable source of current supply thru the wire jacket 30.

Located around t-he opening in the partition plate 12 are a series of spring fingers 31, which are secured to the plate7 as at 32, and which have projecting parts 33 extending over the opening in the plate 12 to engage the upper end 34 of the lamp 25. These iingersare yielding and permit somesllght vertical movement of the lamp.

Surrounding the lower end 35 of the lamp 25 is a sort of wish bone conductor 36, having its ends 37 and 38 connected together by a flexiblewire cable 39 to hold the intermediate parts in intimate contact with the portion 35 of the lamp 25. The point 40 where the endsl join is provided with an orilice 41 to receive the conductor 27 A washer 42 is placed over the wire 27 and a spring washer 43 is 'placed between the conductor 36 and the screw nut .44, so that the lamp 25 is yieldingly supported at its lower end by the conductor 36 and the spring washer, to take u p any jar or impact imparted to the structure in a vertical direction. The `lamp is therefore spring suspended.

Another conductor 46 is connected to a wire 47 that comes from a suitablev source of current supply in the jacket 30 and has an extending elastic end 48 secured to the wire 46 by a nut 50.' rEhe end 4S is more or less yielding and is brought into Contact with the upper conducting end 510i the lamp 25 when the lamp is placed in position, so that the electric current for the lamp "from the wires 27 and 46 has a completed path thru the conductor 48 and the conductor 27.

A ring 54 is secured in the outer wall of the outer .casing to hold a block 55 of insulating material for supporting the terminals of the conductors 27 and 46. A handle 64 is provided by an insulating block which is held in place by the water circulating tubes 56 and 57 which are screwed intoI ttings 55 and 58, respectively, the latter ybeing properly secured to the outer wall of the outer casing. l"

Hollow nuts 60 and 61 are screwed on the outer end of the tubes 56 and 577 respectively, and provide openings in which hose 62 and 68 may be contained, for bringing water to the lamp and in conducting it away from it. The tube 57 is connected to a water conducting pipe 58, which is carried to the partition 19 and is coiled inta ring-69 which is provided with a series of holes 70, so that the water will pass out thru the holes of the ring 69. The bottom 71 oil the lamp structure is secured in place by the screws 72 and it may be provided with holes 73 to permit air to enter the inner casing 11 of the structure.

The arrows show the direction of circulation of the water in the space between the two casings and the space that separates the two lenses, one of'which lenses closes the inner casing and the other closes the outer casing.

There areair chambers 75 and 76 left in the outer casing between its ends and the respective ends of the two casings.

The lamp 25 extends entirely thru the inner casing and into each of the air chambers in which connections to the electric circuits are made without disturbing the water. circulating conduits. y

To remove the lamp it is only necessary to unscrew the unit 44 and when the bottom 71 is removed the lamp .may be moved out of the casing structure.

The part 11C (Fig. 3) of the inner casing is fashioned to provide a light reflector7 preferably, more or less parabolic in form. It is located immediately in the rear of the window lenses' 17 and 18,` and will project the light from the lamp in more or less parallel rays7 providing a beam of maximum density and contributing 4to the eficiency of the device.

Having described my invention what l claim as new and desire to secure by Letters Patent, is y l. A water cooled lamp comprising an outer casing; a shorter inner casing spaced apart from the outer casing leaving a water circulating space therebetween and leaving air chambers in the outer casing between the ends oiI the respective casingsg. a lamp extending thru the inner casing with. its terminals in the respective air chambers to connect the lamp in circuit.

2. A water cooled lamp comprising an outer casing having a light window; a shorter inner'casing having a registering light window spaced away from the outer window, said inner casing spaced away from the outerl casing leaving awa-ter circulating space therebetween and between the windows and leaving air chambers in the outer casing between the ends of the respective casings; a lamp extending thru the inner casing with itsterminals in the respective air chambers, wherebyto connect the lamp in circuit. i

A lamp of the character described comprising an outer casing; an inner casing spaced away from the outer casing to provide a water circulating s ace and leaving air chambers in the ends o the outer casing and yielding means in the respective air chambers to support the lamp to protect it from vertical and lateral vibrations.

4. A lamp of the character described comprising an outer casing; an inner casing spaced away from the outer casing to provide a water circulating space and .leaving air chambers in the ends of the outer casing; yielding means in the respective air chambers to support the lamp to protectI it from vibrations and yielding electrical terminals in said air chambers to connect the lamp in circuit.

5. A lamp of the character described comprising an outer casing; an inner casing spaced away :from the outer casing" to provide a water circulating` space and lea-ving air chambers in the ends of the outer casing; a handle secured to one side of the outer casing; electric conductors passing thru the handle `terminating in the respective air chambers; a lamp extending thru the inner casing and having an electric terminal at each of its ends for coop-eration. with the respective terminals in said air chambers.

6. A lamp of the character described comprising an outer casing; an inner casing spaced away from the outer casina` to pro`- vide water circulating spaces and leaving; air chambers in the ends of the outer casing; a handle secured to one side of the outer casing; electric conductors passing through the handle terminating` in the re spective air chambers; a tube extending between the air chambers and thru the water space thru which one ot' said conductors pass to the lower air chamber; z, lamp extending thru the inner casing` and having| electric terminals at each of its ends for cooperation with the terminals in said air chambers.

7. A lamp of the character described comprising two spaced apart casings, an inner casing), to contain a lamp, an enter casing' to support the lamp and inner casing7 said casings having; spaced apart windows; a transverse wall at each end and an intermediate water distributingl wall arranged to cause water to flow between said windows.

8. A lamp of the character described comprising an outer casing; an inner casing;` spaced away from the outer casing to provide water circulating1 spaces and leaving air chambers in the ends of the outer casing and means between the lamp and the inner casing to Vary the amount of heat caried away from the lamp by the water circulating thru said spaces.

9. A. lamp of the character described comprising an onter casing; an inner casing' spaced away from the outer casing" to provide a water circulating space between the casings; a window lens in each casing` between which water circulates, said inner casing formed into a reflector in rear of said. windows; a handle secured to one side oit the outer casing' and conduits passing thru the handle communicating with the chamber between the casings.

In testimony whereof l hereunto subn scribed my name.

FRITZ A. ANDERSON. 

